Furnace with multiple heat recovery systems

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 3/02 (2006.01) C03B 5/235 (2006.01) C21D 1/00 (2006.01) C22F 1/04 (2006.01) F23L 15/00 (2006.01) F27B 3/26 (2006.01) F27D 17/00 (2006.01)

Patent

CA 2738229

In a furnace such as a glassmelting furnace, a portion of the combustion products formed by combustion of fuel with gaseous oxidant within the furnace are passed through a recuperative or regenerative heat exchanger system to heat a portion of the incoming gaseous oxidant, and a portion of the combustion products are passed instead through a secondary heat exchanger system, wherein the hot combustion products and oxidant which are passed through said first heat exchanger are passed at a heat capacity rate ratio of combustion products to oxidant of less than 1.3.

Selon l'invention, dans un four tel qu'un four de fusion du verre, une partie des produits de combustion formés par la combustion de combustibles avec un oxydant gazeux à l'intérieur du four, traverse un système d'échangeur thermique de récupération ou de régénération pour chauffer une partie de l'oxydant gazeux entrant, et une partie des produits de combustion traverse quant à elle un second système d'échangeur thermique secondaire, les produits de combustion chauds et l'oxydant qui ont traversé ledit premier échangeur thermique passant selon un rapport de taux de capacité thermique des produits de combustion par rapport à l'oxydant inférieur à 1,3.

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